Fifth Workshop on Millimetre Astronomy in Italy

Session

Milky Way

13 Jun 2023, 11:55

26. Claudio Codella - Astrochemistry of Galactic regions: living ALMA, preparing SKA (Review Invited)

13/06/2023, 11:55

Astrochemistry of Galactic regions is living a golden age. More specifically, the study of theso-called interstellar Complex Organic Molecules (iCOMs, mainly O-bearing species with at least 6atoms), considered the simplest bricks needed to have pre-biotic environments, has benefited ofrecent improvements of observational tools. On the one hand, single-dish spectral surveys withtelescopes...

27. Giovanni Sabatini - First ALMA maps of cosmic ray ionization rate in high-mass star-forming regions

13/06/2023, 12:25

Low-energy cosmic rays (<1 TeV) are a pivotal source of ionisation of the interstellar medium, where they play a central role in determining the chemical gas composition and, in turn, in influencing the formation of stars and planets. Observations of H${}_3^{+}$ absorption lines in diffuse clouds -- n(H${}_2$)~10${}^2$ cm${}^{-3}$ -- have been used for decades to provide reliable estimates of the cosmic...

28. Andrea Giannetti - Methanol to the rescue: estimating volume density of molecular gas

13/06/2023, 12:45

Estimates of volume densities (n_H2) are still very uncertain, despite being fundamental to determine the stability of molecular condensations on all scales, from clouds to cores, to protostellar- and protoplanetary disks, their energy balance, and their chemical evolution. While in principle it is easy to use molecular emission to infer the density of the emitting gas, in practice these...

30. Sergio Molinari - Galaxy-wide star formation: zooming in from panoramic Galactic Plane surveys to 1000au-scale with ALMA (Review Invited)

13/06/2023, 14:00

The process of star formation is governed by the interplay of often competing physical agents such as gravity, turbulence, magnetic fields, and radiation. The ISM is organized in a hierarchy of scales, that connect the disk of the Milky Way as a whole, through filamentary atomic/molecular star-forming clouds to dense and fragmenting clumps, and eventually to cores and protoplanetary disks. At...

31. Milena Benedettini - The Forgotten Quadrant Survey: a 12CO and 13CO (1–0) survey of the Galactic Plane in the range 220°<l<240°, -2.5°<b<0°

13/06/2023, 14:30

I will present the Forgotten Quadrant Survey (FQS), a project that used 700 hr of the 12m antenna at the Arizona Radio Observatory to map a strip of the Milky Way plane in the range 220°<l<240° and -2.5°<b<0°, both in 12CO and 13CO (1–0). These data show how the molecular dense gas is organised at different spatial scales: from the spiral arms, traced by the giant clouds with their denser...

32. Alessio Traficante - The SQUALO-ALMA project: clump-fed accretion mechanism in high-mass star-forming objects

13/06/2023, 14:50

The formation mechanism of the most massive stars is far from completely understood. It is still unclear if the formation is core-fed or clump-fed, i.e. if the process is an extension of what happens in low-mass stars, or if the process is more dynamical such as a continuous, multiscale accretion from the gas at parsec (or even larger) scales. In this context I will present the results...

33. Marco Monaci - High Latitude Molecular Clouds chemodynamics using high-resolution multiline spectroscopy

13/06/2023, 15:10

High latitude molecular clouds (HLMC) with no evidence of star formation and generally clear line of sight are the among the best sites to study the dynamics of the the Cold Neutral Medium (CNM) because of the high spatial sampling offered by their proximity. We focus on MBM 40, a non-star forming diffuse cloud, highlighting principal results using a variety of molecular transitions observed...

34. Alessandro Coletta - Fragmentations of ALMAGAL dense clumps in young protoclusters

13/06/2023, 16:00

A large fraction of stars forms in clusters which also include high-mass stars (Mstar ≥ 8 Msun). Yet the physical mechanisms regulating the fragmentation of dense molecular clumps into star-forming cores and its outcome are still under debate. Millimeter/sub-millimeter wavelength observations are ideal probes for this investigation. The ALMAGAL large project survey offers the possibility to...

29. Olga Bayandina - ALMA study of G11.92-0.61: disk-wind or YSO multiplicity?

13/06/2023, 16:20

G11.92-0.61 MM1 is considered to be one of the best known examples of a forming proto-O star, with an accretion disk and outflow marked by various tracers. However, the more detailed structure of the region remains unclear. A comparison of the molecular line and water maser data reveals disparity in their velocity patterns, which can be explained either by the presence of a disk wind or by the...

35. DISCUSSION on Galactic science led by Milena Benedettini and Eleonora Bianchi

13/06/2023, 16:40